Yas yog ib qho ntawm cov khib nyiab uas tsis xeb tawm ntawm kev cuam tshuam ntawm ib puag ncig. Cov khoom siv yas uas tsis siv lawm yuav tsum muab pov tseg. Ob peb lub xyoos dhau los, cov hau kev ntawm kev ua cov khoom yas pib tau tsim. Rov qab siv cov khoom nyoos pab rau cov khoom pov tseg ntawm cov yas ntau.
Cov Lus Qhia
Kauj ruam 1
Cov hau kev rau kev coj ua cov plastics thiab cov khib nyiab los ntawm cov khoom lag luam yas tau muab faib ua ob pawg loj: kev siv tshuab thiab physicochemical. Nrog rau txoj kev siv tshuab, cov khib nyiab tau tsoo. Qhov no ua rau yas tawg lossis cov khoom siv tshuaj lom neeg, uas yog tom qab ntawv pov. Lub cev thiab tshuaj tsis zoo ntawm cov khoom tsis hloov pauv.
Kauj ruam 2
Physicochemical ua thev naus laus zis muaj ntau yam. Ib qho ntawm cov txheej txheem yog qhov kev rhuav tshem ntawm cov khoom siv raw yas, dhau ntawm cov zaj duab xis thiab cov fibers. Cov txheej txheem rov ua cov pellets rau kev txhaj tshuaj moulding tom qab. Cov ntaub ntawv rau polymer txheej feem ntau yog tau los ntawm txoj kev ntawm rov ua dua los ntawm kev daws teeb meem.
Kauj ruam 3
Qhov feem ntau dav hauv kev lag luam kev lag luam plastics yog tus txheej txheem ntawm melting raw khoom, uas tseem hu ua txoj kev ntsiav tshuaj lossis granulation. Hom no tuaj yeem yog "txias" thiab "kub". Qhov sib txawv ntawm cov thev naus laus zis tsis cuam tshuam rau qhov zoo ntawm cov khoom tau txais thaum ua. Yas granules tom qab los ua cov khoom siv raw rau kev tsim cov khoom lag luam pwm rau ntau lub hom phiaj.
Kauj ruam 4
Thawj theem ntawm kev ua cov yas yog kev npaj ntawm raw khoom. Cov khib nyiab yog ntxuav ntawm cov khoom ua tsis huv, qhuav, sib xyaw nrog cov quav tshuaj ntxiv, yog tias tsim nyog, thiab npaj rau molding. Thaum txhaj tshuaj molding, cov cuab yeej tshwj xeeb yog siv rau hauv cov qauv ua duab lossis lub hau. Ntawm qhov tshwj xeeb tseem ceeb yog kev xaiv ntawm cov txheej txheem kev ua haujlwm tshwj xeeb, uas yuav tsum coj mus rau qhov zoo ntawm qhov khoom noj khoom haus thiab qhov txiav txim siab ntawm daim ntawv thov ntawm cov khoom lag luam uas tau txais ib nrab.
Kauj ruam 5
Kub granulation cuam tshuam lub melting ntawm cov yas pov tseg, tom qab uas cov khoom siv yog yuam los ntawm puag ncig lub qhov ntawm cov ua haujlwm nto ntawm cov khoom siv. Qhov tshwm sim yog daim kab xev ntawm cov yas, uas tau tawg los ntawm tig rab riam rau hauv cov ntsiav tshuaj me me (granules). Cov khoom tiav "txias" yog txias los ntawm cov pa uas muaj zog.
Kauj Ruam 6
Kev txias txias yog nqa tawm los ntawm yuam cov khoom ua los ntawm cov phaj perforated. Tom qab ua tiav no, ib daim kab xev yas kuj tau txais. Nws yog mechanicalically faib ua granules. Txhawm rau tiv thaiv cov khoom los ntawm cua sov thaum ua kom tiav, nws txias nrog kua nitrogen.
Kauj Ruam 7
Cov granules tsim thaum ua cov khoom yog nyob rau hauv cov khoom ntawm pob, lub ntsej muag lossis lub tog raj kheej. Cov khoom ua tiav lawm tau ntim rau hauv hnab, tom qab ntawd tau muab tso rau hauv qhov chaw cia khoom ib ntus lossis thauj mus rau qhov chaw tsim khoom ntawm cov khoom yas.
